Don't remove pvs when uninstalling openshift_management

This task removed every PV from my system.

When I ran it the openshift_management_project did not exist so
I would think no PVs would be removed.

Unless there is some way to ensure that this isn't detrimental to
the system as a whole, I suggest we not clean up pvs.

roles/openshift_management/tasks/uninstall.yml

@@ -6,7 +6,6 @@
     - dc
     - po
     - svc
-    - pv
     - pvc
     - statefulsets
     - routes